... Bastion" as it is officially known, quickly became a popular security device even before September 11, 2001. ... after the company that developed it over a decade ago, a British firm called HESCO.2.The ... 33x26x30 ($445), 7x5x100 ($3,700). There is also a special "bunker kit" for building bunkers. Most of the ... to need that much thickness, but just explode creating a lot of fragments.) About four feet of ...